TLDR
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tesseract

 
OCR (Optical Character Recognition) engine. More information: https://github.com/tesseract-ocr/tesseract.
 
  • Recognize text in an image and save it to output.txt (the .txt extension is added automatically):
     
    tesseract {{image.png}} {{output}}
     
  • Specify a custom language (default is English) with an ISO 639-2 code (e.g. deu = Deutsch = German):
     
    tesseract -l deu {{image.png}} {{output}}
     
  • List the ISO 639-2 codes of available languages:
     
    tesseract --list-langs
     
  • Specify a custom page segmentation mode (default is 3):
     
    tesseract -psm {{0_to_10}} {{image.png}} {{output}}
     
  • List page segmentation modes and their descriptions:
     
    tesseract --help-psm

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